added more comments to explain each part

common_paramas.scad

@@ -1,70 +1,116 @@
+// ================= README =================
+// these are the normal parameters used by
+// each one of the layout scripts
+// however they do dont directly use them
+// and instead have thier own copy
+//
+// this was done in order to have more control
+// over each of the scripts themsevels 
+// allowing each to have even more parameters
+// and having them show up in the open scad
+// parameters window
+// ================= README =================
+
 // ================= openscad prams =================
-$fa = 1;
+
+// min angle
+$fa = 0.1;
+
+// min size
 $fs = 0.01;
 // ================= openscad prams =================
 
 // ================= meta =================
+// version number of the current script
 SCRIPT_VERSION="0.0.1";
-// this really just need to be any mon font
+
+// font for layout
 FONT="Ubuntu Sans Mono:style=Regular";
+
+// the test number ref number for this set of IDTs
 test_number = 1;
-// scale in m
+
+// this is needed due to the min size value
+// a pre scaler for the given values
 scale_unit = 1e3;
+
 // ================= meta =================
 
 
 // ================= IDT =================
+
+// the underlying substrate
 substrate = "SI";
+
 // linbo
+// the aoucstice wave speed in the substrate
 c = 3992.0;
 // si
 // c = 3159.0;
+
+// the target frequency of the IDT
 freq = 50.0e6;
 
-// $fs = (c/freq);
-
-// inout distance
+// the distance between the input and output IDT
+// should be between 100-200
 distance = 50;
 
-// number of finger
+// the number of fingers the IDT has
 n_fingers = 50;
 
-// should be 50-70
+// the length of the figure or aperture should be 50-70
 finger_length = 60; 
 
-// for tweaking the design
+// the gap between both sides of the IDT (should be used for tweaking)
 gap = 0;
 
-// for tweaking the design
+// the thickness of the wire the connects all the fingers
 thickness = 0;
 
+// adds an ID number to an IDT, useful if you have multiple on a wafer
 has_id_number = false;
 // ================= IDT =================
 
 // ================= bond pad =================
+
+// the length of the bond pad leg from the edge of the IDT to the center of the bond pad
 leg_length = 0.003;
+
+// the width of the leg
 leg_width = 0.00001875;
+
+// the angle the leg comes off from the IDT,
+// positive angle means the leg is angled away
+// negitive angle means the leg is angled inwards
 leg_angle = 10;
+
+// the size of the bond pad
 size = 0.002;
+
+// the shape of the bond pad (not implemented)
 bond_pad_shape = "square";
+
 // ================= bond pad =================
 
 // ================= text =================
+
 info_block_offset_x=7;
 info_block_offset_y=30;
+// total scale of infoblock
 info_block_scale=0.3;
+
+// the text size of the heading in the info block
 title_text_size = 4;
+
+// the size of all the sub items in the info block
 prop_text_size = 2.5;
+
+// the size of the ID numbers in on the IDTS
 id_text_size = 1;
+
 // ================= text =================
 
-// ================= array spacings =================
-number_of_idts_per_quadrent=4;
-idt_x_spacing = 10;
-idt_y_spacing = 12.5;
-// ================= array spacings =================
-
-
 // ================= wafers =================
+// the size of the wafer in inchs (why inch and not metric like everything else because its standard)
 wafer_size_inch = 4;
 // ================= wafers =================